Two drivers, one owning a large Cadillac and the other owning a small Volkswagen, make a bet. The W owner bets that his car can pull as hard as the Cadillac. They chain the two rear bumpers together in a large empty parking lot. Each driver gets
into his vehicle and applies full power. The Cadillac pulls the VW backward all over the lot. The WW driver later claims that his
car was pulling on the chain as hard as the Cadillac all the time. (Assume that the chain has negligible mass.) What does
Newton's third law say about this claim?

A50 kg student climbs 3 m to the top of a set of stairs. calculate the change in the student’s gravitational potential energy from the bottom to the top of the stairs. show your calculations and include units in your answer. how much total work does the student do while climbing the stairs? show your calculations or explain your reasoning. include units in your answer. it takes the student 30 s to climb to the top of the stairs. what is the average power generated by the student climbing the stairs? show your calculations and include units in your answer. the next day the student carries a 10 kg backpack up the same stairs and again takes 30 s to reach the top of the stairs. is the average power you calculated in part (c) greater than, less than, or equal to the average power the student generated the next day? explain your answer.